﻿var cal;
var isFocus = false; // 是否为焦点
// function SelectDate(obj,strFormat) //两个参数改为只传一个
function SelectDate(obj) {
    var date = new Date();
    var by = date.getFullYear() - 10; // 最小值 → 10 年前
    var ey = date.getFullYear() + 10; // 最大值 → 10 年后
    cal = (cal == null) ? new Calendar(by, ey, 0) : cal; // 初始化为中文版，1为英文版
    // cal.dateFormatStyle = strFormat; // 默认显示格式为:yyyy-MM-dd ,还可显示 yyyy/MM/dd
    cal.show(obj);
}
/**//* 返回日期 */
String.prototype.toDate = function(style) {
    var y = this.substring(style.indexOf('y'), style.lastIndexOf('y') + 1);// 年
    var m = this.substring(style.indexOf('M'), style.lastIndexOf('M') + 1);// 月
    var d = this.substring(style.indexOf('d'), style.lastIndexOf('d') + 1);// 日
    if (isNaN(y))
        y = new Date().getFullYear();
    if (isNaN(m))
        m = new Date().getMonth();
    if (isNaN(d))
        d = new Date().getDate();
    var dt;
    eval("dt = new Date('" + y + "', '" + (m - 1) + "','" + d + "')");
    return dt;
};
/**//* 格式化日期 */
Date.prototype.format = function(style) {
    var o = {
        "M+" : this.getMonth() + 1, // month
        "d+" : this.getDate(), // day
        "h+" : this.getHours(), // hour
        "m+" : this.getMinutes(), // minute
        "s+" : this.getSeconds(), // second
        "w+" : "天一二三四五六".charAt(this.getDay()), // week
        "q+" : Math.floor((this.getMonth() + 3) / 3), // quarter
        "S" : this.getMilliseconds()
    // millisecond
    };
    if (/(y+)/.test(style)) {
        style = style.replace(RegExp.$1, (this.getFullYear() + "").substr(4 - RegExp.$1.length));
    }
    for ( var k in o) {
        if (new RegExp("(" + k + ")").test(style)) {
            style = style.replace(RegExp.$1, RegExp.$1.length == 1 ? o[k] : ("00" + o[k]).substr(("" + o[k]).length));
        }
    }
    return style;
};

/**//*
     * 日历类 @param beginYear 1990 @param endYear 2010 @param lang 0(中文)|1(英语)
     * 可自由扩充 @param dateFormatStyle "yyyy-MM-dd";
     */
function Calendar(beginYear, endYear, lang, dateFormatStyle) {
    this.beginYear = 1990;
    this.endYear = 2010;
    this.lang = 0; // 0(中文) | 1(英文)
    this.dateFormatStyle = "yyyy-MM-dd";

    if (beginYear != null && endYear != null) {
        this.beginYear = beginYear;
        this.endYear = endYear;
    }
    if (lang != null) {
        this.lang = lang
    }

    if (dateFormatStyle != null) {
        this.dateFormatStyle = dateFormatStyle
    }

    this.dateControl = null;
    this.panel = this.getElementById("calendarPanel");
    this.container = this.getElementById("ContainerPanel");
    this.form = null;

    this.date = new Date();
    this.year = this.date.getFullYear();
    this.month = this.date.getMonth();

    this.colors = {
        "cur_word" : "#FFFFFF", // 当日日期文字颜色
        "cur_bg" : "#83A6F4", // 当日日期单元格背影色
        "sel_bg" : "#FFCCCC", // 已被选择的日期单元格背影色
        "sun_word" : "#FF0000", // 星期天文字颜色
        "sat_word" : "#0000FF", // 星期六文字颜色
        "td_word_light" : "#333333", // 单元格文字颜色
        "td_word_dark" : "#CCCCCC", // 单元格文字暗色
        "td_bg_out" : "#EFEFEF", // 单元格背影色
        "td_bg_over" : "#FFCC00", // 单元格背影色
        "tr_word" : "#FFFFFF", // 日历头文字颜色
        "tr_bg" : "#666666", // 日历头背影色
        "input_border" : "#CCCCCC", // input控件的边框颜色
        "input_bg" : "#EFEFEF" // input控件的背影色
    };

    this.draw();
    this.bindYear();
    this.bindMonth();
    this.changeSelect();
    this.bindData();
}

/**//*
     * 日历类属性（语言包，可自由扩展）
     */
Calendar.language ={
    "year" : [ [ "" ], [ "" ] ],
    "months" : [ [ "一月", "二月", "三月", "四月", "五月", "六月", "七月", "八月", "九月", "十月", "十一月", "十二月" ],
            [ "JAN", "FEB", "MAR", "APR", "MAY", "JUN", "JUL", "AUG", "SEP", "OCT", "NOV", "DEC" ] ],
    "weeks" : [ [ "日", "一", "二", "三", "四", "五", "六" ], [ "SUN", "MON", "TUR", "WED", "THU", "FRI", "SAT" ] ],
    "clear" : [ [ "清空" ], [ "CLS" ] ],
    "today" : [ [ "今天" ], [ "TODAY" ] ],
    "close" : [ [ "关闭" ], [ "CLOSE" ] ]
};

Calendar.prototype.draw = function() {
    calendar = this;

    var mvAry = [];
    mvAry[mvAry.length] = ' <div name="calendarForm" style="margin: 0px;">';
    mvAry[mvAry.length] = '    <table width="100%" border="0" cellpadding="0" cellspacing="1">';
    mvAry[mvAry.length] = '      <tr>';
    mvAry[mvAry.length] = '        <th align="left" width="1%"><input style="border: 1px solid '
            + calendar.colors["input_border"] + ';background-color:' + calendar.colors["input_bg"]
            + ';width:16px;height:20px;" name="prevMonth" type="button" id="prevMonth" value="&lt;" /></th>';
    mvAry[mvAry.length] = '        <th align="center" width="98%" nowrap="nowrap"><select name="calendarYear" id="calendarYear" style="font-size:12px;"></select><select name="calendarMonth" id="calendarMonth" style="font-size:12px;"></select></th>';
    mvAry[mvAry.length] = '        <th align="right" width="1%"><input style="border: 1px solid '
            + calendar.colors["input_border"] + ';background-color:' + calendar.colors["input_bg"]
            + ';width:16px;height:20px;" name="nextMonth" type="button" id="nextMonth" value="&gt;" /></th>';
    mvAry[mvAry.length] = '      </tr>';
    mvAry[mvAry.length] = '    </table>';
    mvAry[mvAry.length] = '    <table id="calendarTable" width="100%" style="border:0px solid #CCCCCC;background-color:#FFFFFF" border="0" cellpadding="3" cellspacing="1">';
    mvAry[mvAry.length] = '      <tr>';
    for ( var i = 0; i < 7; i++) {
        mvAry[mvAry.length] = '      <th style="font-weight:normal;background-color:' + calendar.colors["tr_bg"]
                + ';color:' + calendar.colors["tr_word"] + ';">' + Calendar.language["weeks"][this.lang][i] + '</th>';
    }
    mvAry[mvAry.length] = '      </tr>';
    for ( var i = 0; i < 6; i++) {
        mvAry[mvAry.length] = '    <tr align="center">';
        for ( var j = 0; j < 7; j++) {
            if (j == 0) {
                mvAry[mvAry.length] = ' <td style="cursor:default;color:' + calendar.colors["sun_word"] + ';"></td>';
            } else if (j == 6) {
                mvAry[mvAry.length] = ' <td style="cursor:default;color:' + calendar.colors["sat_word"] + ';"></td>';
            } else {
                mvAry[mvAry.length] = ' <td style="cursor:default;"></td>';
            }
        }
        mvAry[mvAry.length] = '    </tr>';
    }
    mvAry[mvAry.length] = '      <tr style="background-color:' + calendar.colors["input_bg"] + ';">';
    mvAry[mvAry.length] = '        <th colspan="2"><input name="calendarClear" type="button" id="calendarClear" value="'
            + Calendar.language["clear"][this.lang]
            + '" style="border: 1px solid '
            + calendar.colors["input_border"]
            + ';background-color:' + calendar.colors["input_bg"] + ';width:100%;height:20px;font-size:12px;"/></th>';
    mvAry[mvAry.length] = '        <th colspan="3"><input name="calendarToday" type="button" id="calendarToday" value="'
            + Calendar.language["today"][this.lang]
            + '" style="border: 1px solid '
            + calendar.colors["input_border"]
            + ';background-color:' + calendar.colors["input_bg"] + ';width:100%;height:20px;font-size:12px;"/></th>';
    mvAry[mvAry.length] = '        <th colspan="2"><input name="calendarClose" type="button" id="calendarClose" value="'
            + Calendar.language["close"][this.lang]
            + '" style="border: 1px solid '
            + calendar.colors["input_border"]
            + ';background-color:' + calendar.colors["input_bg"] + ';width:100%;height:20px;font-size:12px;"/></th>';
    mvAry[mvAry.length] = '      </tr>';
    mvAry[mvAry.length] = '    </table>';
    mvAry[mvAry.length] = ' </div>';
    this.panel.innerHTML = mvAry.join("");

    var obj = this.getElementById("prevMonth");
    obj.onclick = function() {
        calendar.goPrevMonth(calendar);
    };
    obj.onblur = function() {
        calendar.onblur();
    };
    this.prevMonth = obj;

    obj = this.getElementById("nextMonth");
    obj.onclick = function() {
        calendar.goNextMonth(calendar);
    };
    obj.onblur = function() {
        calendar.onblur();
    };
    this.nextMonth = obj;

    obj = this.getElementById("calendarClear");
    obj.onclick = function() {
        calendar.dateControl.value = "";
        calendar.hide();
    };
    this.calendarClear = obj;

    obj = this.getElementById("calendarClose");
    obj.onclick = function() {
        calendar.hide();
    };
    this.calendarClose = obj;

    obj = this.getElementById("calendarYear");
    obj.onchange = function() {
        calendar.update(calendar);
    };
    obj.onblur = function() {
        calendar.onblur();
    };
    this.calendarYear = obj;

    obj = this.getElementById("calendarMonth");
    with (obj) {
        onchange = function() {
            calendar.update(calendar);
        };
        onblur = function() {
            calendar.onblur();
        }
    }
    this.calendarMonth = obj;

    obj = this.getElementById("calendarToday");
    obj.onclick = function() {
        var today = new Date();
        calendar.date = today;
        calendar.year = today.getFullYear();
        calendar.month = today.getMonth();
        calendar.changeSelect();
        calendar.bindData();
        calendar.dateControl.value = today.format(calendar.dateFormatStyle);
        calendar.hide();
    };
    this.calendarToday = obj;
};

// 年份下拉框绑定数据
Calendar.prototype.bindYear = function() {
    var cy = this.calendarYear;
    cy.length = 0;
    for ( var i = this.beginYear; i <= this.endYear; i++) {
        cy.options[cy.length] = new Option(i + Calendar.language["year"][this.lang], i);
    }
};

// 月份下拉框绑定数据
Calendar.prototype.bindMonth = function() {
    var cm = this.calendarMonth;
    cm.length = 0;
    for ( var i = 0; i < 12; i++) {
        cm.options[cm.length] = new Option(Calendar.language["months"][this.lang][i], i);
    }
};

// 向前一月
Calendar.prototype.goPrevMonth = function(e) {
    if (this.year == this.beginYear && this.month == 0) {
        return;
    }
    this.month--;
    if (this.month == -1) {
        this.year--;
        this.month = 11;
    }
    this.date = new Date(this.year, this.month, 1);
    this.changeSelect();
    this.bindData();
};

// 向后一月
Calendar.prototype.goNextMonth = function(e) {
    if (this.year == this.endYear && this.month == 11) {
        return;
    }
    this.month++;
    if (this.month == 12) {
        this.year++;
        this.month = 0;
    }
    this.date = new Date(this.year, this.month, 1);
    this.changeSelect();
    this.bindData();
};

// 改变SELECT选中状态
Calendar.prototype.changeSelect = function() {
    var cy = this.calendarYear;
    var cm = this.calendarMonth;
    for ( var i = 0; i < cy.length; i++) {
        if (cy.options[i].value == this.date.getFullYear()) {
            cy[i].selected = true;
            break;
        }
    }
    for ( var i = 0; i < cm.length; i++) {
        if (cm.options[i].value == this.date.getMonth()) {
            cm[i].selected = true;
            break;
        }
    }
};

// 更新年、月
Calendar.prototype.update = function(e) {
    this.year = e.calendarYear.options[e.calendarYear.selectedIndex].value;
    this.month = e.calendarMonth.options[e.calendarMonth.selectedIndex].value;
    this.date = new Date(this.year, this.month, 1);
    this.changeSelect();
    this.bindData();
};

// 绑定数据到月视图
Calendar.prototype.bindData = function() {
    var calendar = this;
    var dateArray = this.getMonthViewArray(this.date.getFullYear(), this.date.getMonth());
    var tds = this.getElementById("calendarTable").getElementsByTagName("td");
    for ( var i = 0; i < tds.length; i++) {
        tds[i].style.backgroundColor = calendar.colors["td_bg_out"];
        tds[i].onclick = function() {

        };
        tds[i].onmouseover = function() {

        };
        tds[i].onmouseout = function() {

        };
        if (i > dateArray.length - 1)
            break;
        tds[i].innerHTML = dateArray[i];
        if (dateArray[i] != "&nbsp;") {
            tds[i].onclick = function() {
                if (calendar.dateControl != null) {
                    calendar.dateControl.value = new Date(calendar.date.getFullYear(), calendar.date.getMonth(),
                            this.innerHTML).format(calendar.dateFormatStyle);
                }
                calendar.hide();
            };
            tds[i].onmouseover = function() {
                this.style.backgroundColor = calendar.colors["td_bg_over"];
            };
            tds[i].onmouseout = function() {
                this.style.backgroundColor = calendar.colors["td_bg_out"];
            };
            if (new Date().format(calendar.dateFormatStyle) == new Date(calendar.date.getFullYear(), calendar.date
                    .getMonth(), dateArray[i]).format(calendar.dateFormatStyle)) {
                tds[i].style.backgroundColor = calendar.colors["cur_bg"];
                tds[i].onmouseover = function() {
                    this.style.backgroundColor = calendar.colors["td_bg_over"];
                };
                tds[i].onmouseout = function() {
                    this.style.backgroundColor = calendar.colors["cur_bg"];
                }
            }// end if

            // 设置已被选择的日期单元格背影色
            if (calendar.dateControl != null
                    && calendar.dateControl.value == new Date(calendar.date.getFullYear(), calendar.date.getMonth(),
                            dateArray[i]).format(calendar.dateFormatStyle)) {
                tds[i].style.backgroundColor = calendar.colors["sel_bg"];
                tds[i].onmouseover = function() {
                    this.style.backgroundColor = calendar.colors["td_bg_over"];
                };
                tds[i].onmouseout = function() {
                    this.style.backgroundColor = calendar.colors["sel_bg"];
                }
            }
        }
    }
};

// 根据年、月得到月视图数据(数组形式)
Calendar.prototype.getMonthViewArray = function(y, m) {
    var mvArray = [];
    var dayOfFirstDay = new Date(y, m, 1).getDay();
    var daysOfMonth = new Date(y, m + 1, 0).getDate();
    for ( var i = 0; i < 42; i++) {
        mvArray[i] = "&nbsp;";
    }
    for ( var i = 0; i < daysOfMonth; i++) {
        mvArray[i + dayOfFirstDay] = i + 1;
    }
    return mvArray;
};

// 扩展 document.getElementById(id) 多浏览器兼容性 from meizz tree source
Calendar.prototype.getElementById = function(id) {
    if (typeof (id) != "string" || id == "")
        return null;
    if (document.getElementById)
        return document.getElementById(id);
    if (document.all)
        return document.all(id);
    try {
        return eval(id);
    } catch (e) {
        return null;
    }
};

// 扩展 object.getElementsByTagName(tagName)
Calendar.prototype.getElementsByTagName = function(object, tagName) {
    if (document.getElementsByTagName)
        return document.getElementsByTagName(tagName);
    if (document.all)
        return document.all.tags(tagName);
};

// 取得HTML控件绝对位置
Calendar.prototype.getAbsPoint = function(e) {
    var x = e.offsetLeft;
    var y = e.offsetTop;
    while (e = e.offsetParent) {
        x += e.offsetLeft;
        y += e.offsetTop;
    }
    return {
        "x" : x,
        "y" : y
    };
};

// 显示日历
Calendar.prototype.show = function(dateObj, popControl) {
    if (dateObj == null) {
        throw new Error("arguments[0] is necessary")
    }
    this.dateControl = dateObj;

    this.date = (dateObj.value.length > 0) ? new Date(dateObj.value.toDate(this.dateFormatStyle)) : new Date();// 若为空则显示当前月份
    this.year = this.date.getFullYear();
    this.month = this.date.getMonth();
    this.changeSelect();
    this.bindData();
    if (popControl == null) {
        popControl = dateObj;
    }
    var xy = this.getAbsPoint(popControl);
    this.panel.style.left = xy.x - 25 + "px";
    this.panel.style.top = (xy.y + dateObj.offsetHeight) + "px";

    this.panel.style.display = "";
    this.container.style.display = "";

    dateObj.onblur = function() {
        calendar.onblur();
    };
    this.container.onmouseover = function() {
        isFocus = true;
    };
    this.container.onmouseout = function() {
        isFocus = false;
    }
};

// 隐藏日历
Calendar.prototype.hide = function() {
    this.panel.style.display = "none";
    this.container.style.display = "none";
    isFocus = false;
};

// 焦点转移时隐藏日历
Calendar.prototype.onblur = function() {
    if (!isFocus) {
        this.hide();
    }
};
document
        .write('<div id="ContainerPanel" style="display:none;"><div id="calendarPanel" style="position: absolute;display: none;z-index: 9999;');
document
        .write('background-color: #FFFFFF;border: 1px solid #CCCCCC;width:175px;font-size:12px;margin-left:25px;"></div>');
if (document.all) {
    document.write('<iframe style="position:absolute;z-index:2000;width:expression(this.previousSibling.offsetWidth);');
    document.write('height:expression(this.previousSibling.offsetHeight);');
    document.write('left:expression(this.previousSibling.offsetLeft);top:expression(this.previousSibling.offsetTop);');
    document
            .write('display:expression(this.previousSibling.style.display);" scrolling="no" frameborder="no"></iframe>');
}
document.write('</div>');
// -->
